Chemical-engine.



PATENTEN MAY 2, 1905.

W. B. DONNELL.

CHEMICAL ENGINE.-

APPLIOATION FILED APR.11,1904.

Patented May 2, k1905.

WILLIAM B. DNNELL, OF ORANGE, NEW JERSEY.

CHEMICAL-ENGINE..

SPECIFICATION forming part of Letters Patent No. 788,892, dated May 2, 1905.

Application filed April 1l, 1904:. Serial N0. 202,693.

To all whom, it, nto/y con/cern:

Be it known that I, WILLIAM B. DoNNuLL, a citizen of the United States oi America, and a resident of Orange, in the county of Essex and State ot' New Jersey, have invented certain new and useful Improvements in Chemical-Engines, ot' which the following is a specilication.

This invention relates in general to improvements in chemical-engines ot' the kind employed by iire departments, and specifically to a by-pass connecting' the chen1ical-tanks of such engine for controlling the `How of liquids to and from the tanks, and also for making a direct waterway from the receiver or inlet to the delivery-pipe.

The object of the invention is to construct a by-pass wherein all the valves thereof are compactly arranged in a vertical plane and located approximately within the area ot' the front end of the tanks, so that they will be readily accessible from the front end ot' the tanks or one side ot' the engine; also, to reduce the number of valves as at present employed in such by-passes and give a more direct passage to the incoming and outgoing liquids, thereby reducing the friction occasioned by the many angles in the by-passes now in use. The receiver or inlet end of the by-pass has the standard fire-department thread, so that the hose o't saiddepartment can be attached thereto at will when it is desired to relill the chemical-tanks or use the direct water-pipe, which is connected to the delivery-pipe of the tanks. Heretofore in the construction of by-passes for this purpose much trouble has been experienced by not having' the valves controlling the same centralized-that is, some of the by-passes are arranged on the tops ot' the tanks, where the valves are difficult to reach, while some ot' them are so arranged that the valves are located at opposite ends of the tank, making it very confusing to understand their use. In the former construction of by-passes the supply-inlet was of the same area as the tanksupplying' pipes, whereas it should be at least three to one to insure a rapid iilling ot' the tanks and a good serviceable water-stream ot adequate pressure through the direct water- 5 way to the delivery-pipe. The former by passes have also been deticicnt in that the pipes have not been arranged with regard to giving' the least possible amount of friction` the liquid having in many instances to make from tour to six sharp turns before it reaches the delivery-hose. By constructinga b v-pass in the manner hereinafter fully explained these objectionable features are overcome and a by-pass constructed wherein the inlet area is ot' sufficient capacity to supply adequately the three pipes connected, respectively, with the two tanks and the delivery-hose and wherein it is only necessary to employ live valves to accomplish what has heretofore required more valves and also to centralize said valves within a limited space at one end of the tanks and accessible for the operator to control while standing on the ground at the side ol the engine.

My improvement comprises two horizontally-arranged revolublc tanks, horizontal pipes extending forwardly from tle axes ot' tanks, hand-wheels lixed to the horizontal pipes whereby the tanks are revolved, stutting-boxes in which the outer ends of the hori- Zontal pipes are journaled, and a by-pass located in a vertical plane approximately within the area ci. the front end ot' the tanks, supported by the .stutiing-boxes upon the hori- Zontal pipes and consisting ot' an upper pipe located in the same plane as thc horizontal pipes having' elbow-couplings connected with the stuiing-boxes, T-couplings connected with the elbow-couplings, valved couplings having valves and connected with the T-couplings, and a cross-coupling t'or a delivery-pipe connecting the valved couplings, depending pipes connected with the T-couplings, a lower pipe having elbow -couplings connected to the lower end of the depending' pipes, valved couplings having valves and connected to the elbow-couplings, and a cross-coupling for the supply-pipe connecting the valved couplings, and a vertical valved coupling having a valve and connectingthe cross-couplings, all as hereinafter described and claimed.

In order that my invention may be fully understood, I will proceed to describe it with reference to the accompanying drawings, in which- Figure 1 is an end elevation showing the by-pass connected to the front end of two horizontally-arranged chemical-tanks. Fig. 2 is a side View of the same.

1 1 are two chemical-tanks, which are suitably supported in horizontal position on the body of the engine in any desirable manner. (Not shown.) 2 represents horizontal leading-out pipes from the axes of' same, to the outer ends of which are secured hand-wheels 3, said hand-wheels being employed to revolve the tanks when it is necessary to put them in action.

4 represents stufiing-boxes connecting the by-pass with and supporting it on the leadingout pipes 2 and permit the leading-out pipes 2 to be journaled in and form a rotatable connection with said by-pass.

5 is a T-coupliug connected with an upper elbow-coupling 4, secured to a stuffing-box 4 and providing the outlet-pipe from the lefthand tank, and 5 is another T-coupling connected to another upper elbow-coupling 4, secured to the other stufng-box 4 and providing the outlet-pipe from the right-hand tank.

Each of` the pipes has communication with an upper valved coupling 6, having' vertical valves 6', which are controlled by hand-wheels 7. These upper valved couplings 6 are joined by an upper cross-coupling 8 to the deliverypipe 9, located between the upper valved couplings 6.

Connected, respectively, with the T-couplings 5 and 5', between the upper valved couplings 6 and the upper elbow-coup ings 4, are the supply-pipes 10 10. These pipes project downwardly from the T-couplings 5 and 5 and are connected at their lower ends by means of' lower elbow-couplings 4 and lower valved couplings 14 with a cross-coupling 11, connected with the main suppl y-pipe 12. Located in the valved couplings 14 are horizontal valves 14', which are controlled by hand-wheels 15. Connected with the upper cross-coupling 8 and the lower cross-coupling 11 is a watervalved coupling 17, which has located therein, between vthe cross-couplings 8 and 11, a valve 18, controlled by a hand-wheel 19. 1t will be understood that the main supply-pipe 12 is of suicient area to supply equally the lower valved couplings 14 and the depending pipes 10 10 and valved couplings 17 when the controlling-valves of' said valved couplings are open to permit water to fiow into the tanks and directly to the delivery-pipe 9. This is a very important feature in the present invention, inasmuch as it allows water to be applied to the delivery-pipe with suficient pressure to be of value without diminishing the pressure in the depending supply-pipes 10 and 10' while they are refilling the chemical-tanks.

When itis desired to fill or refill the chemical-tanks, the vertical valves 6 ofl the upper valved couplings 6 are first closed, which will cut off' communication with the delivery-pipe 9. The kvalve 18 in the vertical valved coupling 17 is also closed, which will prevent the water from passing directly to the deliverypipe 9. The valves 14 in the lowered valved couplings 14 are then opened, which will permit the water to flow through the lower elbowcouplings 4 and the depending supply-pipes 10 and 10' to the T-couplings 5 and 5 and elbow-couplings 4 and thence through the horizontal pipes 2 to the chemical-tanks. Vhen the tanks are filled, the valves 14' of' the lower valved couplings 14 are closed, whereupon the engine is in condition to be used.

When it is desired to use one ofI the tanks, (presuming it to be the left-hand tank in Fig. 1,) the hand-wheel 3 thereof is turned, which will rotate the said tank 1 and generate the desired gases in the usual manner. The vertical valve 6 of the left-hand upper valved coupling 6 is then opened, whereupon the delivery-pipe 9 will discharge the liquid (after receiving it through the left-hand T-coupling 5 and the left-hand upper valved coupling 6) to the chemical-hose. (Not shown.) When the left-hand tank is empty,the vertical valve 6 in the left-hand upper valved coupling 6 can be closed and the valve 6 of the right-hand upper valved coupling 6 be opened in the same manner, which will continue the supply of` liquid to the delivery-pipe 9 from tank 1 on the righthand side after it has been placed in action in the same manner as has been the tank on the lefthand side. While the tank on the right-hand side is being exhausted, valve 14 of the lefthand lower valved coupling 14 may be opened and the left-hand tank refilled, and in the same manner after the tank on the right-hand side has been exhausted it can be refilled while the tank on the left-hand side is again being used. If both tanks are exhausted at the same time, all valves are closed with the exception of the valves 6 in the upper valved couplings 6, which permit the liquid to reach the delivery-pipe 9 and thence to the chemical-hose. When both tanks have been exhausted, valves 6 in the upper valved couplings 6 are closed and the valves 14 in the lower valved couplings 14 are opened, which will permit the water to flow into the tanks and refill the same. At the same time the valve 18 in the vertical valved coupling 17 is opened, which permits a straight waterway from the main supply-pipe 12 through the lower cross-coupling 11 and the vertical coupling 17 to the delivery-pipe 9 and thence to the chemical-hose. This is a decided advantage, inasmuch as the amount of' water supplied through the main supply-pipe 12 is adequate to rapidly refill the tanks and at the same time maintain the desired pressure through the delivery-pipe to the chemical-hose. Thus IOO ITO

massa it will be seen that the tanks can be exhausted separately or simultaneously, and may be relilled separately or simultaneously and in order to render the chemical-hose serviceable while the tanks are being simultaneously reiilled a direct Waterway is maintained from the main' supply-pipe to the delivery-pipe 9, thereby keeping up a constant flow of liquid through the chemical-hose at all times, whether from' the chemical-tanks or direct from the Inain supply-pipe- Having thus described my invention, the following is what I claim as new therein and desire to secure by Letters Patent:

The combination of two horizontally-arranged revoluble tanks, horizontal pipes eX- tending `forwardly from the axes of tanks, hand wheels Hxed to the horizontal pipes whereby the tanks are revolved, stuffing-boxes in which the outer ends of the horizontal pipes are journaled, and a by-pass located in avertical plane approximately Within the area oi' the front end of the tanks, supported by the stuHing-hoxes upon the horizontal pipes and consisting of an upper pipe located in the sarne plane as the horizontal pipes having' elbowcouplings, connected with the stuffing-boxes,

couplings.

WILLIAM B. DONNELL. Witnesses:

WM. A. COURTLAND, J. GREEN. 

